Unit7SectionA（GrammarFocus-4c）课件-人教版八年级英语下册

Unit7What’sthehighestmountainintheworld?ReviewCanyoutranslatethefollowingsentences?长江大约长6,300千米。TheYangtzeRiverisabout6,300kilometerslong.黄河长5,464千米。TheYellowRiveris5,464kilometerslong.ReviewCanyoutranslatethefollowingsentences?明朝的长城大约有8,850千米长。TheGreatWallinMingdynastyisabout8,850kilometerslong.珠穆朗玛峰高8,844.43米，所以攀登起来很危险。Qomolangmais8,844.43metershighandsoisverydangeroustoclimb.Presentation8,844.4330,0007,000eightthousandeighthundredandforty-fourpointfourthreethirtythousandCanyoureadtheselargenumbers?seventhousand61,021sixty-onethousandandtwenty-onePresentation大数字的表达和读法大于1000的基数词的表达法：①从数字的右端向左数，每三位数加一个逗点；②第一个逗点前的数为thousand（千），

第二个逗点前的数为million（百万），

第三个逗点前的数为billion（十亿）。③读的时候通常在hundred后加and，如果百位数为0，则在thousand

后加and。Presentation26742,674thousandandtwothousandsixhundredandseventy-fourhundred1.从数字右端向左数，每三位数加一个逗点；2.第一个逗点前的数为thousand（千）；3.读的时候通常在hundred后加and。Presentation1835708918,357,089millionandeighteenmillion,threehundredandfifty-seventhousand,andeighty-ninethousand1.从数字右端向左数，每三位数加一个逗点；2.第一个逗点前的数为thousand（千）；第二个逗点前的数为million（百万）；3.读的时候通常在hundred后加and，如果百位数为0，则在thousand后加and。长度、宽度、高度、深度的表示法：老虎路有200米长，而且湿度很重。TigerPathis200___________andhasahighhumidity.我们走上三层楼，大概10米左右高。Wewalkupthreefloors,whichisaboutten_____________.那面镜子有两米宽。Themirroristwo_____________.

长度、宽度、高度、深度的表示法，有一个专门的结构，那就是“基数词+单位词+形容词”。Practisemeterslongmetershighmeterswide教室有25英尺长。Theclassroomis25feetinlength.这个箱子重9公斤。Theboxis9kilos.=Theboxis9kilosinweight.那座桥有三米高。Thebridgeis3metersinheight.2.除了以上的表示方法，有时也可以用“基数词+单位词+in+长度或者重量的名词”来表示长度、宽度、高度、深度。若表示重量，可以用inweight结构。PractiseGrammarFocusWhat'sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It's8,844.43metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.一.语法梳理

形容词比较级/最高级变换规则(1)规则变化①一般在词尾加_______②以字母e结尾的词加______③以一个辅音字母结尾的重读闭音节词，先______该辅音字母，再加______.④以“辅音字母+y”结尾的双音节词，先改_____为_____,再加________.⑤多音节词和部分双音节词，加________(2)不规则变化原级比较级最高级good/wellbad/badlymany/muchlittlefarfarther/furtherfarthest/furthest(3)句型越来越暖和__________________越来越受欢迎_______________越来越...____________________

和…一样_____________________

不及，不如__________________________________________er/estr/st双写er/estyier/estmost注意：比较级是两者之间比较，标志词是_________，

(....的多)_______________;(一点儿，稍微)_______修饰比较级

最高级是三者及三者以上比较，最高级前要加定冠词_________

最...之一__________________

bestworstmostleastwarmerandwarmermoreandmore

popularmuchbetterworsemorelessThe+比较级，the+比较级as形容词/副词原级asnotas/so…..asless形容词/副词原级thanthanalotalittletheoneofthe+形容词最高级+可复

谓语单数(三者或三者以上)the+最高级+of是对应的范围in是指一个广泛的范围上海是中国最大的城市.ShanghaiisthelargestinChina.那个短发的女孩是我们班最高的.Thegirlwithredhairisthetallestinourclass.形容词最高级的常用句型Heisthetallestoftheseboys.(boys和he是对应的,he就是boy)他是这些男孩中最高的。最重要的语言之一是英语。Englishisoneofthemostimportantlanguages.云南是中国最美的城市之一。YunNanisoneofthemostbeatifulcitiesinChina.

Oneof+the+最高级+名词复数“最……的……之一”Fillintheblankswiththecorrectformsofthewordsinthebox.TheAmazonRiverisoneofthe________riversintheworld.It’salittle______thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____.It’soneofthemost________placesforseriousmountainclimbers.3.Nooceanintheworldisas_____asthePacific

Ocean.4.AlthoughJapanis______thanCanada,itis______smaller.longestlongerhighpopularbigoldermuchbigmuchpopularlongoldhigh4aWritetwocomparisonsabouttwotopics.Writetruefacts.4bTwocities:BeijingandShanghaiBeijingisasmodernasShanghai.BeijingisbiggerthanShanghai,butShanghaihasalargerpopulationthanBeijing.BeijingShanghaiTwoanimals:MonkeyandDogAdogisbiggerthanamonkey.Amonkeyissmallerthanadog,butitclimbsatreefasterthanadog.Writefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.Whatisthehighestbuildinginourcity?____________________________________________________________________________________________________________________________________________________Whatisthelongestriverinourcity?Whatisthelargestparkinourcity?Whatisthehighestmountaininourcity?Whatisthemostpopularcinemainourcity?4c

—Whowouldyouliketobeyourassistant,JackorDavid?—IfIhadtochoose,Davidwouldbethe______(good)choice.2.—Howwasyourmathexam,Nancy?—IthinkIdiditwell,althoughitwas_______________(difficult)thanthelastone.3.—Didyouhaveawonderfultimeattheparty?—Yes,it’sthe______________(exciting)oneI’veeverbeento.4.I’dliketoknowifLindaisthesecond______(tall)girlinherclass.5.Nowcomputersareverypopularandtheyaremuch________(cheap)thanbefore.6.—Lookatthatmodelship.—Oh,itlooks